Improvement in trusses



' plate to which the wires are secured.

new sam Nlastima y (nimble.

"SIRYWILLIAM BAKER, or AUSTIN, TEXAS.

Y Letters Patent No.- 107,648, dated September 27, 1870.

IMPROVEMENT IN TRUSSES.

`4The Schedine referred to in these Letters Patent 'and making part of the same.

Nature and y(bjects of thezl'iweat'ion..

The first part of vmy'invention relates to a combination of steel wires, secured in parallel position with each other by transverse bars, to which each wire is secured, forming albeitV which ismade to't to the A y body. The wires, of which there may be five or more iu number, combined, afford suicieut elasticity `to conform to the shape of the human pelvis. The ends of the wires are secured between two metallic plates,

"intogrooves made to receive them.` .A

` The second part of my invention consists of a metal plate, p to which the pads are attached, armed with two y `ilanges projecting at right angles near the endv of., the. plate from its inner edge, at the ends ol' which are transverse lugs Vor ears, working over the edge of the The two plates are heldin position by a screw. At the end of the upper plate an arm rises atright angles, to the end of which is secureda ball. This ball is secured to the pad in this manuel-j:` From the inner surface of' the pad rises a stud or stump,\at the top of which a coucave circular depression forms a socket,rin which the` ball rests,\secured by a' metallic cup, through which the arm (to which the hall is attached) is projected,

through an oriice in its bottom. p Descriptmtfof the accompanying Drawing.

Figure 1 isa side elevation of the machine embody'- ing my invention.

Figure 2.is a verticaltransverse section, showin g the method by which the pads aresecured.

General Description'.

A A are the wires forming the spring.

B B, transverse bars -to which the lwires are se cured. I Y

0, )lates fastened together, clasping 'andsecuring the'ends of the wires, the wires rest-ing in grooves, sov

as to be flush with the inner surface ofthe plates.

D, plateto which Athe pad E is secured.

F, arm, with the ball G attached. l

H, metal cap, which secures the ball G in its socket O, screwed over the ball on the stud or stump J.

The plate C issecured so as to slide underneath the plate D, by the lugs or ears I I.

The screw K, passing through the plate D, enters the holes perforated into the plate C, securing the slide in any desiredposition. p'

Claims.

.I -claim as my inveution.-

v 1 L The combination of wires A A,'forrning 'a spring, secured iu parallel position and in desired distances from each other, by the cross-bars, substantially', and for the purpose hereinbefore set forth.

2. The combination of two plates, Iwith parallel grooves in their surface, into which the wires rest, and secured by being clasped between the two plates, admitting'of their removal and replaced by others, substantially, and for the purpose hereinhefore set forth.

3. The stud or stump rising from the center of the disk E, with the concave circular depression on its top, forming a socket to receive the ball G, and also furnished with `a male screw, for insertion into the metallic cap H, to secure the ball in its socket, all ai:- rauged as described.

XVitnesses; SIR WILLIAM BAKER.

ELDRIDGE J. SMITH, (l. T. SHEPHERD. 

